look at the rear diff and mounted to the bolts that hold the diff cover on will be a tag.I need the numbers off it.Shoud be able to find one of these numbers on it 3.08,3.54,3.73,4.10.If the rear tag is missing check the front diff cover for a tag.then look at the rear diff cover does it look more round or more like a stop sign with sharper corners need to know which it looks like.If thats your jeep in the pic look at your rear diff you will have the dana diff(round looking)